Machine for treating pyraline envelope blanks



Sept. 13, 1932. 1 GUTBERLET 1,877,728

MACHINE FOR TREATING PYRALINE ENVELOPE BLANKS Filed July 8, 1927 way/0M03 TIIIIII'Rv 1111111 Fig? Ulwrles J. abdberlet mozu Mam Peteeie as t- HEa Fist? s, apll intitiew Qt ame F iii as d fili Eigsunr e-d g m 1- T heinath H efletth sli c b C reug Pe t ff'th fma e- Fig-1& is a u hg enary; y

portion f hetopjbloekviewed from beneath, the l ho p at ii QW a P tiofnjd' p g-"l S-I iBCfiiQ TQ i l 1- 5 6 fQfjF 5- ,Figi] ji s jfra gmentarviewjof the adJustjable'hotplateg Themachine has; a plateblock and H p'thebed platehavingftheguidesfor the blanks.

- T e mistress I among others, thetithe closed? period is adavantageoiislybi it CQn tantduration. A rh-eo offtheh,otplates,Thehotplate block is moviableand thebedstationary. Bythis arrangewant; ifvided and 21and the stop, st able conveniently it the projecting adtibnb the mp ca ries the hot plates eat the ends of the with th the b p mgprov ded await 1 T TE ear thejopposit'efstationary hOfivPlate.

, r te an le l v l ta mechanism, whichis;automaticj'for-the reason"statj21f is; fbl'bVidd ofregulate the quantity y0f;.electric currentpassing through they coils 1' iment preferablycarries the hot foldinglines of the blank. L

llnesses yieldeurrnnnnnr, or PHIfLADELPI-IIA, PENNSYLVANIA bitTREATINGPYRALINEENVELOPEBLANKS i ppiiati i fiiea faui s s, iew; Serial No.204,403. 4 i I p I V for pyralme envelope for bending-Pinto the comuohamachine hasto give an" aidily colitreneagao the lines i1en 1iie is bentto the jcams,, 7, 7 acting on the cam bearings 10 I wh ch are fastenedtothe connections 6', 6,

' attached to the block,"4. By rotating these camsfat a constant speedthe duration of the" 7 contact between thehot plates andthe blanks ismade practically 'equalin time for every lank. Any. variation being thatif one of the blanks is thicker than I another the thicker l i blankwill havea slightly longer contact.

The cams can be carried by the ears, 80, 80,

projecting from a standard,5,that also .car-

riesarheostat, 21, having the movable con- W p I pp p tact, 31 and thefixed contactsAl. ew on an enlarged scale of a I A means by which thecams, 7 7, are driven at constant speed is illustrated in Figures 1,

2, and 3. The camsare mounted on shafts driven'by the gear wheels, 27,27, that are, in turn, drivenby the gear Wheel, 28, which is placed onthesame shaft as the pulley, 29,, which is driven by the belt,'56. I

"The h'otplates, 8, 18, and 9v are carried by 75" the block, 4. The hotplates, 8, and 18 are usually fixed and fitwiththe guides, 1, and stop,ll'but the hotplate, 9, is adjustable to a hot plates. The movable hotplate, 9, has

similarly, the ridge, 49. So positioning these ridges is because theflaps of the blank, in-

tended to be turned over, will lie outside the A suitable constructionof the hot plates such as that formed of the plates, 94,92 and 93, (seeparticularly Fig. 6). The electrical I p p p g connections between theheating coil of the blank ]while; ibeing treated, is protactswith awire, 96, passing through the insulation, 95.

As the present machine is intended to operate with a; substantiallyfixed time of con: tact between the hot plate'and the pyraline,

(lit with the guide 2. The hot plates, 8,'and 18, have the ridges, 39,39, which register 1S H shown in Figs. 4-, 5,.a'nd 6. The heating coils,as 53,91 and 54.; are placed'inside a casing varying the heating of thehot plates to ac commodate them to softening the pyraline whenofdifferent grades and thickness,'1s

often very important. For this purpose the 6 inclusion of a rheostat orsimilar device in the heating circuit is very advantageous. Anillustrative diagram of the course of the electric current-athroughitheheaters for the hot plates is shown'in'Fig. 4. is a source of 10electrical energy 67 a conductor leading to v the movablearmlf31'lofitherheostatiiZIand;

' 91, 53 and 54 a series of heating coils. In the form of my inventeddevice which I find-best in practice the current (see Fig. 5 is carriedfrom the binding post 62-,to the coils'52 of theheater forthe; hot plate518,- and to the bar,50 ..which.latter isin electrical connection 7witlithe'heating coil 9 1 through the conduc-p tor 96 .which passesthrough the insulation 2Q ;95.- insulati ng.th'e side plates 93 .and'92,from "thecon ductor. 50.5 The: grounding of the circuits be;accomplished very. conveniently on the machine itself. L The course ofthecurrent throughthe coils 58, 54 and- 91 '5:-..is.. illaustrateddiagrammatically in Fig. 4 V Where60 is a sourceof electrical energythat is groundedfthrough the conductor 68 torthe groundlf55.The-ptlrerlpole gof the generator 61..is.connecte d by 'the conductor67. and the W-movablearmBl and thefixed armel of :the:

rheostat 21 and the conductor 61 with the,

coils53gb4and through.theconductor50 with i the coil 91; "'lhe. current,after traversing these. coils, passes, through. the conductor 7 5:1totheground76 Fig. 3 shows part ofthe coursezoffa: current through themachine. I

The; conductor" 64;- connects electrically the; rheo'stat 21 and thecoilsofthehot pl'ates8 18,and.9l, and the conductor 65' connects the 14q ;rheostat'21-.wi thla ground 5 50. V

, c The machineislloperatedbypassinganelectrio currentthroughlthehotaplate coils, and

V causing theh'ot plate block tobe lifted;and

, lowered so that it will rest on the blank on the -bedlQThe parts.offthe blank with which the ridgesg 39. and 49,;contactlwill be. moreheat-.

edl than the parts; lying beneath the other: parts.ofthehotialates. Theheat of theplates and- -th-e..time. of contact? with .the blanks deat-ter ins :the ektent of. the softening, of: the

substance of the pyralinerzand its flexibility,-Within...reasonablealimits.'in practice I m ake the-periochof,reciprocating movement of the hot plate blockl constant and. use therheostat into regulate the: amount of current flowing through the.coils, and} consequently their 1 temperature.

invention is not limitedyto the para ticnlanform of press mechanismemployed s'otherw1se'than thatthe hot plate block is al lowed to descendyieldingly upon the bed and I to rest the hot plates on the blankwithout.-

producing positive: pressure thereon, non'is it.

V limited :bythe particular formaofthe electric- .coehe ters, norbytheparticular-means'for-varye line of the folds sitioned toliftpositively 'the hot plate block,

and to allow it-to-"descendyieldingly upon the bed; alternately,hot'plates having projecting ridges corresponding to the lines of the.folds desired] tov be-made in said blanks and electrical heatersforlsaidhot plates the,- i

said automatic lifting mechanism. having provisions allowing thehotplates to descend until stopped by contact with. the blanks and 5 pausebefore being again lifted;

2. In. amachine forsofteninggpyraline envelopei blanks along the linesvof the folds;

intended to be made. therein, having abed and". a, hot plate blockpositioned above and 99 movable-towards and away fronrsaidbei andactuated yieldingly. toward. said bed the combination comprisingautomaticyl-ifting mechanism alternatively lifting I positivelyandallowing to descend yieldingly saidQhot:

plate: block'tupon the bed, hot plates p osi tioned upon said block andhaving ridgesele' .vated above the restoffthe surface fofjthe blockcorresponding tothe 1 lines ;of the folds intendedtofl-be. made in the.blank, electrical 100.

heaters for said blanks and means for vary in gthe current,.-p.assi11g.throughsaid heaters thereby varying grades and thicknesses of pyralinemaybe treated without changing the 'speed of the said automatic.mechanism. 1

3. .In- ,a machine for softeningpyraline. en

velopejblanks; along; the lines: of thefolds intended 5130; be. madetherein, abed and a hot plate block positioned aboveandmovable to- Vward and away from said bed and means for yieldingly actuating the hotplate b1ockjto--. ward the bed, the combination with the hot.

plate block ofielectrically-heated, hot plates;

secured. to saidhotplate block each plate having a longitudinal ridgeext'ending the lla. length .of said'hot plate, saidhot plates being- 7arranged upon said-block so that the said 1 ridges will contact withthe. blank along the.) 1

v intendedatobemadeinlsaid blank. 12a

.7 4.1,The device as defiI-Ied in claim 3 wherein one of the hotplatesis adjustable alongsaid.

block toward. and away from the otherhot; f

plates. 5 H

5. Ina machinejfortreating pyraline a velopeblanks to, soften the samealongfthe, lines ofthe folds intendedto be madein said, blanks. thecombination comprising? a set of;- elongated electrically. heatedv hotplates, each plate having a longitudinalridge projecting zlos.

'bybnd th general Level such plsite, means jfpr bririgihg yieldihgly thesaid i'idges ir i' contact withthsaid blankalong the lines of thefolds'intended to bqmade [thereingand means for contrdl l ihg thetemperatui'e of said plates byjraryihg f the elc tricj durrent; r '6; Thd ideas defind in claim 5 wherein ohe fof :the said hot plgts' isadjustable with 0 1% JAYGUTBERLET- r

